<?php if (false):?>
<form method="get" id="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">
	<input type="text" class="field" name="s" id="s" placeholder="<?php esc_attr_e( 'Enter keywords', 'twentyeleven' ); ?>" />
	<input type="submit" class="submit" name="submit" id="searchsubmit" value="<?php esc_attr_e( 'Search', 'twentyeleven' ); ?>" />
</form>

<?php else:?>
	<form method="get" id="searchform" action="https://www.google.com.vn/search" target="_blank">
		<input type="text" class="field" name="q" id="s" placeholder="<?php esc_attr_e( 'Enter keywords', 'twentyeleven' ); ?>" />
		<input type="submit" class="submit" name="submit" id="searchsubmit" value="<?php esc_attr_e( 'search', 'twentyeleven' ); ?>" />
	</form>
	<script type="text/javascript" src="<?php echo get_template_directory_uri(); ?>/js/search.js"></script>
	
<?php endif;?>